The U2896B is a modulation PLL for GSM, DCS, and PCS systems. It is realized using TEMIC's advanced silicon bipolar UHF5S technology and integrates a mixer, an I/Q modulator, a phase-frequency detector (PFD) with two synchronous programmable dividers, and a charge pump. The U2896B is designed for cellular phones such as GSM900, DCS1800, and PCS1900, applying transmitter architecture at which the VCO operates at the TX output frequency. No duplexer is needed since the out-of-band noise is very low. The U2896B exhibits low power consumption and broadband operation for high flexibility in multi-band frequency mappings. The IC is available in a shrinked small-outline 36-pin package (SSO36).
The U2896B is a monolithic integrated circuit realized using TEMIC's advanced silicon bipolar UHF5S technology. It integrates a mixer, an I/Q modulator, a phase-frequency detector (PFD) with two synchronous programmable dividers, and a charge pump. The device is designed for cellular phones such as GSM900, DCS1800, and PCS1900, applying a transmitter architecture where the VCO operates at the TX output frequency, eliminating the need for a duplexer due to very low out-of-band noise.
| Current consumption (Active) | 50 mA |
|---|---|
| Package type | SSO36 |
| Operating temperature | -20 to +85 °C |
| Carrier suppression (MDO) | -32 to -35 dBc |
The device can operate at an ambient temperature of up to +85 °C.
The maximum supply voltage for the charge pump is 5.5 V.
The charge pump output can deliver a maximum current of 5 mA.